Question

我开始直接使用Swift开发应用程序，所以我几乎不知道有关Objective C的想法，但是我不得不接受一个在Objective C中实现并修复了一些bug的项目。

我在Swift中遇到了一个代码，我希望转换为Objective C

func mySpecialFunction(){

let importMenu = UIDocumentMenuViewController(documentTypes: [String(kUTTypePDF)], in: .import)
            importMenu.delegate = self
            importMenu.modalPresentationStyle = .formSheet       
            self.present(importMenu, animated: true, completion: nil)
}

现在我做了一些研究并得到了这个

UIDocumentMenuViewController *importMenu = *Code Here* ;
importMenu.delegate = self;
importMenu.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentModalViewController:importMenu animated:YES];

任何人都可以帮助我如何在代码中将第一行转换为Objective C？

Answer 1

请试试这个。

 UIDocumentMenuViewController *importMenu = [[UIDocumentMenuViewController alloc] initWithDocumentTypes:@[(__bridge NSString*)kUTTypeContent] inMode:UIDocumentPickerModeImport];

Answer 2

UIDocumentMenuViewController *importMenu = [[UIDocumentMenuViewController alloc] initWithDocumentTypes:@[@"public.item", (__bridge NSString *) kUTTypeContent, (__bridge NSString *) kUTTypeData, (__bridge NSString *) kUTTypePackage, (__bridge NSString *) kUTTypeDiskImage, @"com.apple.iwork.pages.pages", @"com.apple.iwork.numbers.numbers", @"com.apple.iwork.keynote.key"] inMode:UIDocumentPickerModeImport];

使用上面的代码

将代码从Swift转换为Objective C？

2 个答案: